4620A. Voluntary Termination of Registration

A Registered Reporting ADF Market Maker may voluntarily terminate its registration in a security by (1) withdrawing its quotations from NASD's Alternative Display Facility and not re-entering its quotations for five (5) minutes, or (2) failing to re-enter quotations within thirty (30) minutes of the end of a trading halt. A Registered Reporting ADF Market Maker that voluntarily terminates its registration in a security may not re-register as a market maker in that security for twenty (20) business days, absent an excused withdrawal specified in Rule 4619A. Withdrawal from participation as a Registered Reporting ADF Market Maker in NASD's Alternative Display Facility shall constitute termination of registration as a market maker in that security for purposes of this Rule; provided, however, that a Registered Reporting ADF Market Maker that fails to maintain a clearing arrangement with a registered clearing agency or with a member of such an agency and thereby terminates its registration as a market maker in Nasdaq securities may register as a market maker at any time after a clearing arrangement has been reestablished.